21425034350 has 24 divisors (see below), whose sum is σ = 39875885280. Its totient is φ = 8564568320.

The previous prime is 21425034341. The next prime is 21425034383. The reversal of 21425034350 is 5343052412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56195 + ... + 214494.

It is an arithmetic number, because the mean of its divisors is an integer number (1661495220).

Almost surely, 2^21425034350 is an apocalyptic number.

21425034350 is a deficient number, since it is larger than the sum of its proper divisors (18450850930).

21425034350 is a wasteful number, since it uses less digits than its factorization.

21425034350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272284 (or 272279 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 21425034350 its reverse (5343052412), we get a palindrome (26768086762).

The spelling of 21425034350 in words is "twenty-one billion, four hundred twenty-five million, thirty-four thousand, three hundred fifty".